lesson learned about round head jig molds

[PA_Slabs]

That purity has some to do with it, but more to do with the size of the head and the collar added on as I don't think the mold makers consider that at all. If purity was a big issue then my 1/64 wouldn't hit exactly on 1/64 IMHO! Now I don't pour heads so this just just from what I have seen and use to by my heads from a guy that used pretty darn pure lead and still not right. Also if purity was the issue then they would even be heavier when using just lead, but they are too heavy anyway. All of my heads that are too heave are not pure lead and if they were they would even be more off.


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I don't pour either. Here's the thing tho. A lot of guys will pour w better quality/purer lead when making 1/80 and 1/64s b/c it has a lower melting temp allows it to pour easier into the small molds. So that may explain why the smaller sizes are more accurate.


Also, a lot of pourers will modify their molds for the collared jigs. A very small change in the diameter of a sphere has a suprising affect to the volume/mass.